[rtsan] Remove mkfifoat interceptor (#116997)
[llvm-project.git] / libcxx / include / __memory_resource / memory_resource.h
blobf93f10fe21a2d00386b9c774f0b0980e2a3299ce
1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
9 #ifndef _LIBCPP___MEMORY_RESOURCE_MEMORY_RESOURCE_H
10 #define _LIBCPP___MEMORY_RESOURCE_MEMORY_RESOURCE_H
12 #include <__config>
13 #include <__cstddef/max_align_t.h>
14 #include <__cstddef/size_t.h>
15 #include <__fwd/memory_resource.h>
17 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
18 # pragma GCC system_header
19 #endif
21 #if _LIBCPP_STD_VER >= 17
23 _LIBCPP_BEGIN_NAMESPACE_STD
25 namespace pmr {
27 // [mem.res.class]
29 class _LIBCPP_AVAILABILITY_PMR _LIBCPP_EXPORTED_FROM_ABI memory_resource {
30 static const size_t __max_align = alignof(max_align_t);
32 public:
33 virtual ~memory_resource();
35 [[nodiscard]] [[using __gnu__: __returns_nonnull__, __alloc_size__(2), __alloc_align__(3)]]
36 _LIBCPP_HIDE_FROM_ABI void* allocate(size_t __bytes, size_t __align = __max_align) {
37 return do_allocate(__bytes, __align);
40 [[__gnu__::__nonnull__]] _LIBCPP_HIDE_FROM_ABI void
41 deallocate(void* __p, size_t __bytes, size_t __align = __max_align) {
42 do_deallocate(__p, __bytes, __align);
45 _LIBCPP_HIDE_FROM_ABI bool is_equal(const memory_resource& __other) const noexcept { return do_is_equal(__other); }
47 private:
48 virtual void* do_allocate(size_t, size_t) = 0;
49 virtual void do_deallocate(void*, size_t, size_t) = 0;
50 virtual bool do_is_equal(memory_resource const&) const noexcept = 0;
53 // [mem.res.eq]
55 inline _LIBCPP_AVAILABILITY_PMR _LIBCPP_HIDE_FROM_ABI bool
56 operator==(const memory_resource& __lhs, const memory_resource& __rhs) noexcept {
57 return &__lhs == &__rhs || __lhs.is_equal(__rhs);
60 # if _LIBCPP_STD_VER <= 17
62 inline _LIBCPP_AVAILABILITY_PMR _LIBCPP_HIDE_FROM_ABI bool
63 operator!=(const memory_resource& __lhs, const memory_resource& __rhs) noexcept {
64 return !(__lhs == __rhs);
67 # endif
69 // [mem.res.global]
71 [[__gnu__::__returns_nonnull__]] _LIBCPP_AVAILABILITY_PMR _LIBCPP_EXPORTED_FROM_ABI memory_resource*
72 get_default_resource() noexcept;
74 [[__gnu__::__returns_nonnull__]] _LIBCPP_AVAILABILITY_PMR _LIBCPP_EXPORTED_FROM_ABI memory_resource*
75 set_default_resource(memory_resource*) noexcept;
77 [[using __gnu__: __returns_nonnull__, __const__]] _LIBCPP_AVAILABILITY_PMR _LIBCPP_EXPORTED_FROM_ABI memory_resource*
78 new_delete_resource() noexcept;
80 [[using __gnu__: __returns_nonnull__, __const__]] _LIBCPP_AVAILABILITY_PMR _LIBCPP_EXPORTED_FROM_ABI memory_resource*
81 null_memory_resource() noexcept;
83 } // namespace pmr
85 _LIBCPP_END_NAMESPACE_STD
87 #endif // _LIBCPP_STD_VER >= 17
89 #endif // _LIBCPP___MEMORY_RESOURCE_MEMORY_RESOURCE_H